Career
He is a long time shihan (Teaching Master) of Tenshin Shōden Katori Shintō-ryū bujutsu, which he learned as a disciple of the previous teaching master Hayashi Yazaemon (1892-1964) from the time he entered the school at the age of 16, in 1942. He lives and teaches in rural location near Narita city, in Chiba Prefecture of Japan. The teachings of Tenshin Shōden Katori Shintō-ryū were designated an Intangible Cultural Asset of Chiba Prefecture in 1960, with Ōtake designated as guardian of the tradition.
British Broadcasting Corporation Documentary, The Way of the Warrior, British Broadcasting Corporation, 29/6/1983 John Wate, Le katana, sabre de samouraï, Arte Doc, 2005 Nihon Number Ken Jutsu, Gakken, 30/01/2008, () "REAL SAMURAI" Nippon Hōsō Kyōkai World TV22/06/2014.